Elasticsearch output plugin for Fluentd


For details, see https://github.com/uken/fluent-plugin-elasticsearch.

Example Deployment: Save all logs to Elasticsearch

Example output configurations

    host: elasticsearch-elasticsearch-cluster.default.svc.cluster.local
    port: 9200
    scheme: https
    ssl_verify: false
    ssl_version: TLSv1_2
      timekey: 1m
      timekey_wait: 30s
      timekey_use_utc: true



Send your logs to Elasticsearch

api_key (*secret.Secret, optional)

api_key parameter adds authentication header.

application_name (*string, optional)

Specify the application name for the rollover index to be created.

Default: default

buffer (*Buffer, optional)


bulk_message_request_threshold (string, optional)

Configure bulk_message request splitting threshold size. Default value is 20MB. (20 * 1024 * 1024) If you specify this size as negative number, bulk_message request splitting feature will be disabled.

Default: 20MB

content_type (string, optional)

With content_type application/x-ndjson, elasticsearch plugin adds application/x-ndjson as Content-Profile in payload.

Default: application/json

custom_headers (string, optional)

This parameter adds additional headers to request. Example: {“token”:“secret”}

Default: {}

customize_template (string, optional)

Specify the string and its value to be replaced in form of hash. Can contain multiple key value pair that would be replaced in the specified template_file. This setting only creates template and to add rollover index please check the rollover_index configuration.

data_stream_enable (*bool, optional)

Use @type elasticsearch_data_stream

data_stream_ilm_name (string, optional)

Specify an existing ILM policy to be applied to the data stream. If not present, either the specified template’s or a new ILM default policy is applied. Further details here https://github.com/uken/fluent-plugin-elasticsearch#configuration---elasticsearch-output-data-stream

Default: data_stream_name

data_stream_ilm_policy (string, optional)

Specify data stream ILM policy contents as Hash.

data_stream_ilm_policy_overwrite (bool, optional)

Specify whether overwriting data stream ilm policy or not.

data_stream_name (string, optional)

You can specify Elasticsearch data stream name by this parameter. This parameter is mandatory for elasticsearch_data_stream. There are some limitations about naming rule. For more details https://www.elastic.co/guide/en/elasticsearch/reference/master/indices-create-data-stream.html#indices-create-data-stream-api-path-params

data_stream_template_name (string, optional)

Specify an existing index template for the data stream. If not present, a new template is created and named after the data stream. Further details here https://github.com/uken/fluent-plugin-elasticsearch#configuration---elasticsearch-output-data-stream

Default: data_stream_name

default_elasticsearch_version (string, optional)

This parameter changes that ES plugin assumes default Elasticsearch version.

Default: 5

deflector_alias (string, optional)

Specify the deflector alias which would be assigned to the rollover index created. This is useful in case of using the Elasticsearch rollover API

enable_ilm (bool, optional)

Enable Index Lifecycle Management (ILM).

exception_backup (*bool, optional)

Indicates whether to backup chunk when ignore exception occurs. (default: true)

Default: true

fail_on_detecting_es_version_retry_exceed (*bool, optional)

fail_on_detecting_es_version_retry_exceed (default: true)

Default: true

fail_on_putting_template_retry_exceed (*bool, optional)

Indicates whether to fail when max_retry_putting_template is exceeded. If you have multiple output plugin, you could use this property to do not fail on fluentd statup.(default: true)

Default: true

flatten_hashes (bool, optional)

Elasticsearch will complain if you send object and concrete values to the same field. For example, you might have logs that look this, from different places: {“people” => 100} {“people” => {“some” => “thing”}} The second log line will be rejected by the Elasticsearch parser because objects and concrete values can’t live in the same field. To combat this, you can enable hash flattening.

flatten_hashes_separator (string, optional)

Flatten separator

host (string, optional)

You can specify the Elasticsearch host using this parameter.

Default: localhost

hosts (string, optional)

You can specify multiple Elasticsearch hosts with separator “,”. If you specify the hosts option, the host and port options are ignored.

http_backend (string, optional)

With http_backend typhoeus, elasticsearch plugin uses typhoeus faraday http backend. Typhoeus can handle HTTP keepalive.

Default: excon

id_key (string, optional)


ignore_exceptions (string, optional)

A list of exception that will be ignored - when the exception occurs the chunk will be discarded and the buffer retry mechanism won’t be called. It is possible also to specify classes at higher level in the hierarchy. For example ignore_exceptions ["Elasticsearch::Transport::Transport::ServerError"] will match all subclasses of ServerError - Elasticsearch::Transport::Transport::Errors::BadRequest, Elasticsearch::Transport::Transport::Errors::ServiceUnavailable, etc.

ilm_policy (string, optional)

Specify ILM policy contents as Hash.

ilm_policy_id (string, optional)

Specify ILM policy id.

ilm_policy_overwrite (bool, optional)

Specify whether overwriting ilm policy or not.

include_index_in_url (bool, optional)

With this option set to true, Fluentd manifests the index name in the request URL (rather than in the request body). You can use this option to enforce an URL-based access control.

include_tag_key (bool, optional)

This will add the Fluentd tag in the JSON record.

Default: false

include_timestamp (bool, optional)

Adds a @timestamp field to the log, following all settings logstash_format does, except without the restrictions on index_name. This allows one to log to an alias in Elasticsearch and utilize the rollover API.

Default: false

index_date_pattern (*string, optional)

Specify this to override the index date pattern for creating a rollover index.

Default: now/d

index_name (string, optional)

The index name to write events to

Default: fluentd

index_prefix (string, optional)

Specify the index prefix for the rollover index to be created.

Default: logstash

log_es_400_reason (bool, optional)

By default, the error logger won’t record the reason for a 400 error from the Elasticsearch API unless you set log_level to debug. However, this results in a lot of log spam, which isn’t desirable if all you want is the 400 error reasons. You can set this true to capture the 400 error reasons without all the other debug logs.

Default: false

logstash_dateformat (string, optional)

Set the Logstash date format.

Default: %Y.%m.%d

logstash_format (bool, optional)

Enable Logstash log format.

Default: false

logstash_prefix (string, optional)

Set the Logstash prefix.

Default: logstash

logstash_prefix_separator (string, optional)

Set the Logstash prefix separator.

Default: -

max_retry_get_es_version (string, optional)

You can specify the number of times to retry fetching the Elasticsearch version.

Default: 15

max_retry_putting_template (string, optional)

You can specify times of retry putting template.

Default: 10

password (*secret.Secret, optional)

Password for HTTP Basic authentication. Secret

path (string, optional)

Path for HTTP Basic authentication.

pipeline (string, optional)

This param is to set a pipeline id of your elasticsearch to be added into the request, you can configure ingest node.

port (int, optional)

You can specify the Elasticsearch port using this parameter.

Default: 9200

prefer_oj_serializer (bool, optional)

With default behavior, Elasticsearch client uses Yajl as JSON encoder/decoder. Oj is the alternative high performance JSON encoder/decoder. When this parameter sets as true, Elasticsearch client uses Oj as JSON encoder/decoder.

Default: false

reconnect_on_error (bool, optional)

Indicates that the plugin should reset connection on any error (reconnect on next send). By default it will reconnect only on “host unreachable exceptions”. We recommended to set this true in the presence of elasticsearch shield.

Default: false

reload_after (string, optional)

When reload_connections is true, this is the integer number of operations after which the plugin will reload the connections. The default value is 10000.

reload_connections (*bool, optional)

You can tune how the elasticsearch-transport host reloading feature works.(default: true)

Default: true

reload_on_failure (bool, optional)

Indicates that the elasticsearch-transport will try to reload the nodes addresses if there is a failure while making the request. This can be useful to quickly remove a dead node from the list of addresses.

Default: false

remove_keys (string, optional)


remove_keys_on_update (string, optional)

Remove keys on update will not update the configured keys in elasticsearch when a record is being updated. This setting only has any effect if the write operation is update or upsert.

remove_keys_on_update_key (string, optional)

This setting allows remove_keys_on_update to be configured with a key in each record, in much the same way as target_index_key works.

request_timeout (string, optional)

You can specify HTTP request timeout.

Default: 5s

resurrect_after (string, optional)

You can set in the elasticsearch-transport how often dead connections from the elasticsearch-transport’s pool will be resurrected.

Default: 60s

retry_tag (string, optional)

This setting allows custom routing of messages in response to bulk request failures. The default behavior is to emit failed records using the same tag that was provided.

rollover_index (bool, optional)

Specify this as true when an index with rollover capability needs to be created. https://github.com/uken/fluent-plugin-elasticsearch#rollover_index

Default: false

routing_key (string, optional)

Similar to parent_key config, will add _routing into elasticsearch command if routing_key is set and the field does exist in input event.

ca_file (*secret.Secret, optional)

CA certificate

client_cert (*secret.Secret, optional)

Client certificate

client_key (*secret.Secret, optional)

Client certificate key

client_key_pass (*secret.Secret, optional)

Client key password

scheme (string, optional)

Connection scheme

Default: http

slow_flush_log_threshold (string, optional)

The threshold for chunk flush performance check. Parameter type is float, not time, default: 20.0 (seconds) If chunk flush takes longer time than this threshold, fluentd logs warning message and increases metric fluentd_output_status_slow_flush_count.

sniffer_class_name (string, optional)

The default Sniffer used by the Elasticsearch::Transport class works well when Fluentd has a direct connection to all of the Elasticsearch servers and can make effective use of the _nodes API. This doesn’t work well when Fluentd must connect through a load balancer or proxy. The parameter sniffer_class_name gives you the ability to provide your own Sniffer class to implement whatever connection reload logic you require. In addition, there is a new Fluent::Plugin::ElasticsearchSimpleSniffer class which reuses the hosts given in the configuration, which is typically the hostname of the load balancer or proxy. https://github.com/uken/fluent-plugin-elasticsearch#sniffer-class-name

ssl_max_version (string, optional)

Specify min/max SSL/TLS version

ssl_min_version (string, optional)

ssl_verify (*bool, optional)

Skip ssl verification (default: true)

Default: true

ssl_version (string, optional)

If you want to configure SSL/TLS version, you can specify ssl_version parameter. [SSLv23, TLSv1, TLSv1_1, TLSv1_2]

suppress_doc_wrap (bool, optional)

By default, record body is wrapped by ‘doc’. This behavior can not handle update script requests. You can set this to suppress doc wrapping and allow record body to be untouched.

Default: false

suppress_type_name (*bool, optional)

Suppress type name to avoid warnings in Elasticsearch 7.x

tag_key (string, optional)

This will add the Fluentd tag in the JSON record.

Default: tag

target_index_key (string, optional)

Tell this plugin to find the index name to write to in the record under this key in preference to other mechanisms. Key can be specified as path to nested record using dot (’.’) as a separator. https://github.com/uken/fluent-plugin-elasticsearch#target_index_key

target_type_key (string, optional)

Similar to target_index_key config, find the type name to write to in the record under this key (or nested record). If key not found in record - fallback to type_name.

Default: fluentd

template_file (*secret.Secret, optional)

The path to the file containing the template to install. Secret

template_name (string, optional)

The name of the template to define. If a template by the name given is already present, it will be left unchanged, unless template_overwrite is set, in which case the template will be updated.

template_overwrite (bool, optional)

Always update the template, even if it already exists.

Default: false

templates (string, optional)

Specify index templates in form of hash. Can contain multiple templates.

time_key (string, optional)

By default, when inserting records in Logstash format, @timestamp is dynamically created with the time at log ingestion. If you’d like to use a custom time, include an @timestamp with your record.

time_key_format (string, optional)

The format of the time stamp field (@timestamp or what you specify with time_key). This parameter only has an effect when logstash_format is true as it only affects the name of the index we write to.

time_parse_error_tag (string, optional)

With logstash_format true, elasticsearch plugin parses timestamp field for generating index name. If the record has invalid timestamp value, this plugin emits an error event to @ERROR label with time_parse_error_tag configured tag.

time_precision (string, optional)

Should the record not include a time_key, define the degree of sub-second time precision to preserve from the time portion of the routed event.

type_name (string, optional)

Set the index type for elasticsearch. This is the fallback if target_type_key is missing.

Default: fluentd

unrecoverable_error_types (string, optional)

Default unrecoverable_error_types parameter is set up strictly. Because es_rejected_execution_exception is caused by exceeding Elasticsearch’s thread pool capacity. Advanced users can increase its capacity, but normal users should follow default behavior. If you want to increase it and forcibly retrying bulk request, please consider to change unrecoverable_error_types parameter from default value. Change default value of thread_pool.bulk.queue_size in elasticsearch.yml)

use_legacy_template (*bool, optional)

If set to true, the output uses the legacy index template format. Otherwise, it uses the composable index template format.

Default: true

user (string, optional)

User for HTTP Basic authentication. This plugin will escape required URL encoded characters within %{} placeholders, for example, %{demo+}

utc_index (*bool, optional)

By default, the records inserted into index logstash-YYMMDD with UTC (Coordinated Universal Time). This option allows to use local time if you describe utc_index to false.(default: true)

Default: true

validate_client_version (bool, optional)

When you use mismatched Elasticsearch server and client libraries, fluent-plugin-elasticsearch cannot send data into Elasticsearch.

Default: false

verify_es_version_at_startup (*bool, optional)

Because Elasticsearch plugin should change behavior each of Elasticsearch major versions. For example, Elasticsearch 6 starts to prohibit multiple type_names in one index, and Elasticsearch 7 will handle only _doc type_name in index. If you want to disable to verify Elasticsearch version at start up, set it as false. When using the following configuration, ES plugin intends to communicate into Elasticsearch 6. (default: true)

Default: true

with_transporter_log (bool, optional)

This is debugging purpose option to enable to obtain transporter layer log.

Default: false

write_operation (string, optional)

The write_operation can be any of: (index,create,update,upsert)

Default: index